1 Explain that a population pyramid shows the age and sex structure of a population. 2  Point to the horizontal bars, which show the percentage (or the absolute number) of males and females in each age group. 3  Have students interpret the chart.
1 Although they range from $150-$400 or more, a large capacity (25-70 pints) dehumidifier for a basement (the dampest portion of most homes) or other large area averages $200-$300.
When talking about size, we mean how much moisture the dehumidifier will remove from the air. That is measured in pints. Most companies that make dehumidifiers offer a few different sizes. For instance, Frigidaire offers a 30 pint dehumidifier, a 50 pint dehumidifier and a 70 pint dehumidifier. A dehumidifier used in a very large space or a very damp space needs to be larger than one used in a small space that is not very damp.